By Sheryl Nadler -- Have you ever found yourself in the produce section of the grocery store, waffling over whether or not you should spend the extra two dollars for a half pint of organic blueberries for your toddler? If only there was some guide that could help you decide. Well, there is. The Environmental Working Group (EWG), an American non-profit organization who says its mission is to promote public health, releases an annual Shopper’s Guide to Pesticides in Produce. And number 10 on their 2011 Dirty Dozen list? Those blueberries you were considering.